Supports – Including additional vibrating mass
Patent
1981-02-20
1983-09-13
Foss, J. Franklin
Supports
Including additional vibrating mass
248638, 248659, F16M 1300
Patent
active
044037627
ABSTRACT:
A mount is disclosed mounting an internal combustion engine in a unitized vehicle body. The mount comprises an intermediate mass which is independent of the vehicle structure and the powertrain and is adapted to be frequency tuned. Separate elastomeric bodies couple the intermediate mass to the vehicle structure and to the powertrain and the intermediate mass is predetermined in combination with the elastomeric characteristics of the coupling bodies so as to resonate at a frequency within an uncoupled intermediate frequency range such that the transmissibility of the mount is attenuated substantially throughout a high frequency range to reduce vehicle structure noise caused by the engine's combustion process while satisfying other transmissibility criteria at the lower frequencies. In another embodiment, a portion of the intermediate mass is isolated and sprung from the remainder and the resonant intermediate mass frequencies are tuned to have substantially different peaks to further reduce the magnitude of the transmitted force at resonance while still attenuating the high frequency engine combustion caused vibrations.
REFERENCES:
patent: 1731540 (1929-10-01), Powell
patent: 1766925 (1930-06-01), Moorhouse
patent: 3018990 (1962-01-01), Muller
patent: 3091103 (1963-05-01), Goodwin
patent: 3445080 (1969-05-01), Flannelly
patent: 3667706 (1972-06-01), Tiberghien
patent: 3730462 (1973-05-01), Dick
Cogswell, II James A.
Malen Donald E.
Foss J. Franklin
General Motors Corporation
Phillips R. L.
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